The Visualforce page is working fine in prod, but I spun up a Sandbox to do some dev work on it and the CSS wasn't loading, nor was jQuery. jQuery seems to be the first area where things start to break.
When I checked the network tab and compared what was loading between Sandbox and Prod, everything was the same up until it came time to load "jquery-1.11.0.min.js"... Prod was loading it, but the Sandbox wasn't. The snippet
<script src="https://code.jquery.com/jquery-1.11.0.min.js"></script> is what is called to load the script, and it is only called in one spot based on a "Find in Folder" search in the codebase. There seem to be no references around it that are broken when comparing Sandbox and Prod. All Static Resources are exactly the same. There seems to be no difference in anything, besides the actual behavior. I've tried substituting jQuery.noConflict() in all places in all places this code touches, nothing.
Does anyone have a hunch about what may be happening?